Boom attachment



Feb. 8; '1955 F. E. COPE 2,701,647

BOOM ATTACHMENT Filed March 11, 1954 5 Sheets-Sheet 1 /2\6 I28 Fig. I30 o 1 I32 I06 T) I08 ALLLAL Firman E. Cope INVENTOR.

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Feb. 8, 1955 F. E. coPE 2,

' BOOM ATTACHMENT Filed March 11, 1954 3 Sheets-Sheet 2 46 V i Firmqn E. Cape 36 INVENTOR.

34 50 5 52 BY I8 80 Ammqs Feb. 8, 1955 F. E. cPE ,6

BOOM ATTACHMENT I Filed March 11, 1954 s Sheets-Sheet s 36 F/rman E. Cope INVENTOR.

BY WW 3M United States Patent BOOM ATTACHMENT Firman E. Cope, Mapleton, Oreg.

Application March 11, 1954, Serial No. 415,605

Claims. (Cl. 212-144) This invention relates to improvements in booms and pertains more particularly to an improved form of boom specifically adapted for use in the manipulation, handling and loading of logs.

A primary object of this invention is to provide an improved form of boom which will be extremely rigid as regardsvbending and torsional loads and wherein a hoist carriage is movably mounted thereon in such a manner as to be substantially fully within the confines of the boom So that it will receive the maximum of protection while being permitted a full range of manipulation, the boom being so constructed as to permit dismounting of thecarriage while at the same time combining a maximum of rigidity with a minimum of weight.

These together with other objects and advantages which will become subsequently apparent reside in the details of construction and operation as more fully hereinafter described and-claimed, reference being had to the accompanying drawings forming a part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure 1 is a side elevational view showing the improved boom in place;

Figure 2 is a top plan view of the boom;

Figure 3 is a rear end view of the boom;

Figure 4 is a top plan view of the boom with the top plate members removed and a portion of the backbone broken away to show details of construction;

Figure 5 is a longitudinal section taken through the boom as indicated by section line 5-5 in Figure 2;

Figure 6 is an enlarged sectional view showing details of the hoisting carriage and its manner of connection with the-operating means therefor;

Figure 7 is a vertical transverse section taken substantially along the plane of section line 7-7 of Figure 6;

Figure 8 is a horizontal section taken substantially along the plane of section line 8-8 in Figure 6;

Figure 9 is a transverse vertical section taken substantially along the plane of section line 99 in Figure 2; and.

Figure 10 is a bottom plan view of the boom.

Referring now more particularly to the drawings, and for the present most specifically to Figures 4 and 9 thereof, reference numeral 10 indicates generally the backbone member which constitutes a main portion of the boom and which is constructed in such a manner as to provide a web portion 12, a pair of depending leg portions 14 and 16 and generally L-shaped track portions 18 and 20 including the horizontal and vertical flange portions 22 and 24 respectively.

Top plate members 26 and 28 are secured along opposite sides of the web portion 12 and extend angularly downwardly therefrom in the manner shown most clearly in Figure 9 and attach at their outer edges to the box or rectangular portions 30 and 32 as more clearly set forth hereinafter. Secured along the lower or free edges of the legs 14 and 16 are the bottom plate members 34 and 36 which project horizontally outwardly therefrom and terminate in the rearward portion of the boom in the previously mentioned box sections 30 and 32 which are integrally formed therewith and may be secured to the main portions of the bottom plates by welding as at 38 and 40.

Secured between the top and bottom plate members at opposite sides of the backbone are the vertical stiffening plates 42 and 44 and, as will be seen more clearly in Figure 4, these vertical stiffening plates extend longitudinally of the boom in parallelism with the legs 14 and 16 of the backbone and are interconnected by a series of transverse stiffening plates .46 and 48 in the manner shown.

The bottom surface of the bottom plates 34. and 36 are provided with a series of parallel, longitudinally extending rigidifying rib members 50 and 52.

As seen most clearly in Figure 2, the boom incorporates a relatively narrow forward portion and a substantially wider rearward portion, the latter of which is provided with the previously mentioned box sections 3.0 and'32:

and it will be seen that in the region between the forward and rear portions are a plurality of transverse stiffening webs 54 secured to the upper surface of the upper plates 26 and 28 as well as me upper surface of the web portion 12 of the backbone 10. These webs are formed to properly fit upon this portion of the. boom as will be readily apparent from a study of Figure 9.

Disposed between the legs 14 and 16 of the backbonemember is a hoist carriage indicated generally by the reference character 56 and which incorporates a pair of longi-- tudinal frame members 58 and 60 rigidly. interconnected at their opposite ends by the cross-bar members 62 and 64. A pair of transverse axle members 66 and 68-.are journaled in the frame members 58 and 60 and extend beyond opposite sides thereof and are provided thereat With the wheel members 70 and 72. The tire portion of each of these wheels includes the usual face 74 and flange 76, the former engaging upon the vertical flange portion 24 of the track assemblies 18 and 20.

Intermediate the ends of the frame members 60 and 58' integral gear 92, the latter being in mesh with a pinion- 94 secured to a drive shaft 96. The drum assembly isv journaled on the boom by means of a pair of bearing assemblies 98 and 100 secured to the top surface thereof and the drive shaft 96 is journaled on the boom at one end in one of the legs of the backbone and the other end in a generally L-shaped bracket 102 secured to the opposite backbone leg. It will be noted .that'the drive shaft 96 also is provided with a sprocket 104 which is engaged with a chain 106 driven by any suitable mechanism located in the movable power unit indicated. generallyv by the:

reference character 108. This power unit may be of any conventional type such as is used with power shovels and the like. The bracket 102 also journals a pulley shaft .110

upon which the pulley 112 is secured, the purpose of this.

construction being presently apparent.

The power unit 108may be any type conventionally provided and as is conventional on these structures is pro vided with a vertical mast member 114 to which one end of the boom assembly is pivotally attached as at 116 by virtue of pivot pins extending through bracket ears 118 and 120 secured to the boom for this purpose. A cable 122 under the control of the operator of the power unit is trained over a pulley 124 at the top of the mast and extends therefrom over the sheave assembly 126 carried by the bracket ears 128 on the forward end of the boom and back to a similar sheave assembly 130 at the top of the mast, all of this construction being conventional in this art.

A further cable 132 extends under the operators control in the power unit over the previously mentioned pulley 112 between the legs of the backbone and extends over the pulley 86 on the hoist carriage, the purpose of this cable being to selectively control the release of a grapple mechanism or the like. The drum 90, being driven by the chain 106, receives a few turns of a cable 134- which extends at one end to one of the bar members 62 on the hoist carriage and at its opposite end is trained about a pulley member 136 journaled on a shaft 138 between suitable brackets 140, 142 and the forward extremity of the boom. The opposite free end of the cable 134 then attaches to the other of the crossbars 64. In this manner, it will be readily apparent that as the drum Patented Feb. .8, .1955v 90 is rotated in one direction or the other, the carriage assembly will be moved forward and aft along the boom.

Thus, it will be readily apparent that the hoisting carriage may be moved forwardly or rearwardly on the boom assembly at the will of the operator and it is to be noted that a further cable 144 is trained over the previously mentioned pulley 84 on the hoist carriage assembly and extends therefrom back to the power unit under the control of the operator and it is to be further noted that the free end of this cable is provided with a pair of log tongs 146 for grabbing a log. With this particular boom attachment, it will be readily apparent that the hoisting carriage is substantially fully enclosed within the confines of the boom assembly, that is, it is substantially enclosed by the backbone 1t such that there is no danger of a swinging log from striking and damaging this unit. At the same time, the specific construction of boom set forth enables the carriage to be so mounted while at the same time its construction is such as to combine maximum rigidity with a minimum of weight. With the use of this boom, extremely heavy logs can be manipulated by a conventional power unit, it being manifest that the heavier the log which might otherwise tend to tip the power unit, it is within the control of the operator to move the hoisting carriage to the rear of the boom so as to obviate such tipping.

From the foregoing, the construction and operation of the device will be readily understood and further explanation is believed to be unnecessary. However, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction shown and described, and accordingly all suitable modifications and equivalents may be resorted to, falling within the scope of the appended claims.

What is claimed as new is as follows:

1. A boom attachment for power shovels, comprising an elongated backbone member having a web portion, a pair of depending legs at opposite sides of said web and a pair of L-shaped track portions formed on the free edges of said legs, a pair of top plates secured along opposite sides of said web portion of the backbone and extending angularly downwardly therefrom, a pair of horizontal bottom plates secured along the free edges of said legs and extending outwardly therefrom, a plurality of vertical stiffening plates secured between said top and bottom plates and extending parallel to the legs of said backbone, and a lifting carriage disposed between said legs having wheels engaged upon said track portions for movement therealong.

2. A boom attachment for power shovels, comprising an elongated backbone member having a web portion, a pair of depending legs at opposite sides of said web and a pair of L-shaped track portions formed on the free edges of said legs, a pair of top plates secured along opposite sides of said web portion of the backbone and extending angularly downwardly therefrom, a pair of horizontal bottom plates secured along the free edges of said legs and extending outwardly therefrom, a plurality of vertical stiffening plates secured between said top and bottom plates and extending parallel to the legs of said backbone, said boom having a relatively narrow forward portion and a substantially wider rearward portion, said bottom plates in said rearward portions being formed at the opposite far edges thereof with box-like sections, and a lifting carriage disposed between said legs having Wheels eiigaged upon said track portions for movement therea ong.

3. A boom attachment for power shovels, comprising an elongated backbone member having a web portion, a pa r of depending legs at opposite sides of said Web and a pair of L-shaped track portions formed on the free edges of said legs, a pair of top plates secured along opposite sides of said web portion of the backbone and extending angularly downwardly therefrom, a pair of horizontal bottom plates secured along the free edges of said legs and extending outwardly therefrom, a plurality of vertical stiffening plates secured between said top and bottom plates and extending parallel to the legs of said backbone, and a lifting carriage disposed between said legs having wheels engaged upon said track portions for movement therealong, said stifiening plates being rigidly interconnected by a series of transverse plate members.

4. A boom attachment for power shovels, comprising arr elongated backbone member having a web portion, a pan of depending legs at opposite sides of said web and a pair of L-shaped track portions formed on the free edges of said legs, a pair of top plates secured along opposite sides of said web portion of the backbone and extending angularly downwardly therefrom, a pair of horizontal bottom plates secured along the free edges of said legs and extending outwardly therefrom, a plurality of vertical stiffening plates secured between said top and bottom plates and extending parallel to the legs of said backbone, a plurality of longitudinally spaced, transverse webs secured to the top sufaces of said upper plates, and a lifting carriage disposed between said legs having wheels engaged upon said track portions for movement therealong.

5. A boom attachment for power shovels, comprising an elongated backbone member having a Web portion, a pair of depending legs at opposite sides of said web and a pair of L-shaped track portions formed on the free edges of said legs, a pair of top plates secured along opposite sides of said web portion of the backbone and extending angularly downwardly therefrom, a pair of horizontal bottom plates secured along the free edges of said legs and extending outwardly therefrom, a plurality of vertical stiffening plates secured between said top and bottom plates and extending parallel to the legs of said backbone, said boom having a relatively narrow forward portion and a substantially Wider rearward portion, said bottom plates in said rearward portions being formed at the opposite far edges thereof with box-like sections, a plurality of longitudinally spaced, transverse webs secured to the top surfaces of said upper plates, and a lifting carriage disposed between said legs having wheels engaged upon said track portions for movement therealong.

No references cited. 

